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// Copyright 2015 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package command
import (
"errors"
"os"
"time"
"github.com/urfave/cli"
"go.etcd.io/etcd/client/v2"
"go.etcd.io/etcd/pkg/v3/cobrautl"
)
// NewSetCommand returns the CLI command for "set".
func NewSetCommand() cli.Command {
return cli.Command{
Name: "set",
Usage: "set the value of a key",
ArgsUsage: "<key> <value>",
Description: `Set sets the value of a key.
When <value> begins with '-', <value> is interpreted as a flag.
Insert '--' for workaround:
$ set -- <key> <value>`,
Flags: []cli.Flag{
cli.IntFlag{Name: "ttl", Value: 0, Usage: "key time-to-live in seconds"},
cli.StringFlag{Name: "swap-with-value", Value: "", Usage: "previous value"},
cli.IntFlag{Name: "swap-with-index", Value: 0, Usage: "previous index"},
},
Action: func(c *cli.Context) error {
setCommandFunc(c, mustNewKeyAPI(c))
return nil
},
}
}
// setCommandFunc executes the "set" command.
func setCommandFunc(c *cli.Context, ki client.KeysAPI) {
if len(c.Args()) == 0 {
handleError(c, cobrautl.ExitBadArgs, errors.New("key required"))
}
key := c.Args()[0]
value, err := argOrStdin(c.Args(), os.Stdin, 1)
if err != nil {
handleError(c, cobrautl.ExitBadArgs, errors.New("value required"))
}
ttl := c.Int("ttl")
prevValue := c.String("swap-with-value")
prevIndex := c.Int("swap-with-index")
ctx, cancel := contextWithTotalTimeout(c)
resp, err := ki.Set(ctx, key, value, &client.SetOptions{TTL: time.Duration(ttl) * time.Second, PrevIndex: uint64(prevIndex), PrevValue: prevValue})
cancel()
if err != nil {
handleError(c, cobrautl.ExitServerError, err)
}
printResponseKey(resp, c.GlobalString("output"))
}
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